//SamXIAO
#include <bits/stdc++.h>
using namespace std;
#define PI 3.1415926
#define   SQUARE(x) ((x)*(x))
//double SQUARE(double x) { return x*x;}
#define N_MAX 987654321
#define N_MIN -N_MAX
int f[286];
char s1[1086];
char s2[2020];
void w1()
{
	int cnt = 0, ans = 0, n;
	scanf("%s", s1);
	char p1, p2;
	for(int i=0; i<strlen(s1); i++) {
		if(i == strlen(s1) - 1){
			printf("%c", s1[i] + s1[0]);
		}
		else{
			printf("%c", s1[i] + s1[i+1]);
		}
	}
}

int main()
{
	w1();
  return 0;
}
